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<a href="_ackley_e_s_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="preprocessor">#include &lt;<a class="code" href="_individual_8h.html">shark/Algorithms/DirectSearch/Individual.h</a>&gt;</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="preprocessor">#include &lt;<a class="code" href="_uniform_crossover_8h.html">shark/Algorithms/DirectSearch/Operators/Recombination/UniformCrossover.h</a>&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="preprocessor">#include &lt;<a class="code" href="_simulated_binary_crossover_8h.html">shark/Algorithms/DirectSearch/Operators/Recombination/SimulatedBinaryCrossover.h</a>&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="preprocessor">#include &lt;<a class="code" href="_ackley_8h.html">shark/ObjectiveFunctions/Benchmarks/Ackley.h</a>&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="preprocessor">#include &lt;<a class="code" href="_multi_variate_normal_distribution_8h.html">shark/Statistics/Distributions/MultiVariateNormalDistribution.h</a>&gt;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="keyword">using namespace </span><a class="code hl_namespace" href="namespaceshark.html" title="AbstractMultiObjectiveOptimizer.">shark</a>;</div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span> </div>
<div class="foldopen" id="foldopen00009" data-start="{" data-end="}">
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"><a class="line" href="namespaceexample.html">    9</a></span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceexample.html">example</a> {</div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"><a class="line" href="namespaceexample.html#a767279e41fda5517fbdd8a3fb9cd8797">   11</a></span>    <span class="keyword">typedef</span> <a class="code hl_class" href="classshark_1_1_individual.html" title="Individual is a simple templated class modelling an individual that acts as a candidate solution in a...">Individual&lt; RealVector, double, double&gt;</a> <a class="code hl_typedef" href="namespaceexample.html#a767279e41fda5517fbdd8a3fb9cd8797">IndividualType</a>;</div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"><a class="line" href="namespaceexample.html#a454de5897c467e1fbd4f372d2b1933de">   12</a></span>    <span class="keyword">typedef</span> std::vector&lt; IndividualType &gt; <a class="code hl_typedef" href="namespaceexample.html#a454de5897c467e1fbd4f372d2b1933de">Population</a>;</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span>    <span class="keyword">struct </span>FitnessComparator {</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span>        <span class="keywordtype">bool</span> operator()( <span class="keyword">const</span> <a class="code hl_class" href="classshark_1_1_individual.html" title="Individual is a simple templated class modelling an individual that acts as a candidate solution in a...">IndividualType</a> &amp; a, <span class="keyword">const</span> <a class="code hl_class" href="classshark_1_1_individual.html" title="Individual is a simple templated class modelling an individual that acts as a candidate solution in a...">IndividualType</a> &amp; b ) {</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span>            <span class="keywordflow">return</span>( a.<a class="code hl_function" href="classshark_1_1_individual.html#a27124e785660f26f56ab638568f1f5f1" title="Returns a reference to the unpenalized fitness of the individual.">unpenalizedFitness</a>() &lt; b.<a class="code hl_function" href="classshark_1_1_individual.html#a27124e785660f26f56ab638568f1f5f1" title="Returns a reference to the unpenalized fitness of the individual.">unpenalizedFitness</a>() );</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span>        }</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span>    };</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span>}</div>
</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span> </div>
<div class="foldopen" id="foldopen00023" data-start="{" data-end="}">
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"><a class="line" href="_ackley_e_s_8cpp.html#a3c04138a5bfe5d72780bb7e82a18e627">   23</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="_datasets_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>( <span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> ** argv ) {</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span> </div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>    <span class="keyword">const</span> <span class="keywordtype">unsigned</span> Mu           = 15;</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span>    <span class="keyword">const</span> <span class="keywordtype">unsigned</span> Lambda       = 100;</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span>    <span class="keyword">const</span> <span class="keywordtype">unsigned</span> Dimension    = 30;</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span>    <span class="keyword">const</span> <span class="keywordtype">double</span> InitialSigma   = 3.;</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span>    </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>    <span class="comment">// Instantiate the objective function</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>    <a class="code hl_struct" href="structshark_1_1benchmarks_1_1_ackley.html" title="Convex quadratic benchmark function with single dominant axis.">benchmarks::Ackley</a> ackley( Dimension );</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>    </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>    <span class="comment">// Initialize the mutation distribution</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>    <a class="code hl_class" href="classshark_1_1_multi_variate_normal_distribution.html" title="Implements a multi-variate normal distribution with zero mean.">MultiVariateNormalDistribution</a> mutationDistribution;</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>    mutationDistribution.<a class="code hl_function" href="classshark_1_1_multi_variate_normal_distribution.html#a58c4c416f7e516ccd28dc53ae7828d78" title="Resizes the distribution. Updates both eigenvectors and eigenvalues.">resize</a>(Dimension);</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>    </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span>    <a class="code hl_class" href="classshark_1_1_individual.html" title="Individual is a simple templated class modelling an individual that acts as a candidate solution in a...">example::IndividualType</a> prototypeIndividual;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>    prototypeIndividual.<a class="code hl_function" href="classshark_1_1_individual.html#addfc461c9e7394ee238e6f5c18537646" title="Returns a reference to the chromosome that is associated with the individual.">chromosome</a>() = InitialSigma;</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>    </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>    <a class="code hl_typedef" href="namespaceexample.html#a454de5897c467e1fbd4f372d2b1933de">example::Population</a> parents( Mu, prototypeIndividual );</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>    <a class="code hl_typedef" href="namespaceexample.html#a454de5897c467e1fbd4f372d2b1933de">example::Population</a> offspring( Lambda );</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span>    </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>    <span class="comment">// Initialize parents (not a god idea to start in a single point, shouldn&#39;t do this in practice)</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>    <span class="keywordflow">for</span>(<span class="keyword">auto</span>&amp; ind: parents ) {</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span>        ind.searchPoint() = ackley.<a class="code hl_function" href="structshark_1_1benchmarks_1_1_ackley.html#a0c9e13f0da191fcf2a83988ff5680096" title="Proposes a starting point in the feasible search space of the function.">proposeStartingPoint</a>( );</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    }</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>    </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>    <span class="comment">// Evolutionary operators</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span>    <a class="code hl_class" href="classshark_1_1_uniform_crossover.html" title="Uniform crossover of arbitrary individuals.">UniformCrossover</a> uniform;</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>    </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span>    <span class="comment">// standard deviations for mutation of sigma</span></div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>    <span class="keywordtype">double</span>     tau0 = 1. / sqrt(2. * Dimension);</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>    <span class="keywordtype">double</span>     tau1 = 1. / sqrt(2. * sqrt( <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>( Dimension ) ) );</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span> </div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>    </div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>    <span class="keywordflow">while</span>( ackley.<a class="code hl_function" href="classshark_1_1_abstract_objective_function.html#afaa9cc39ccb4d74a0d6db0ae2d087051" title="Accesses the evaluation counter of the function.">evaluationCounter</a>() &lt; 10000 ) {</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>    </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>        <span class="keywordflow">for</span>( std::size_t i = 0; i &lt; offspring.size(); i++ ) {</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>        </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>            <span class="comment">// Select two parent individuals at random</span></div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>            example::Population::const_iterator mom = parents.begin() + <a class="code hl_function" href="namespaceshark_1_1random.html#aa64d4174eaf7111b03e0504eaa56b666" title="Draws a discrete number in {low,low+1,...,high} by drawing random numbers from rng.">random::discrete</a>(<a class="code hl_variable" href="namespaceshark_1_1random.html#ab5c1547eee483974d008d43f621a2234">random::globalRng</a>,  std::size_t(0), parents.size() - 1 );</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>            example::Population::const_iterator dad = parents.begin() + <a class="code hl_function" href="namespaceshark_1_1random.html#aa64d4174eaf7111b03e0504eaa56b666" title="Draws a discrete number in {low,low+1,...,high} by drawing random numbers from rng.">random::discrete</a>(<a class="code hl_variable" href="namespaceshark_1_1random.html#ab5c1547eee483974d008d43f621a2234">random::globalRng</a>,  std::size_t(0), parents.size() - 1 );</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>        </div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>            <span class="comment">// Recombine step size</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>            offspring[i].chromosome() = <a class="code hl_function" href="namespaceshark_1_1random.html#a18f302ea18f70835c59935973ba8ea84" title="Draws a number uniformly in [lower,upper] by drawing random numbers from rng.">random::uni</a>(<a class="code hl_variable" href="namespaceshark_1_1random.html#ab5c1547eee483974d008d43f621a2234">random::globalRng</a>,  mom-&gt;chromosome(), dad-&gt;chromosome() );         </div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>            <span class="comment">// Mutate step size</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>            offspring[i].chromosome() *= <a class="code hl_function" href="namespaceshark_1_1random.html#a60fd3f351bd3faeaf71cc790c774ee7d" title="Draws a number from the log-normal distribution as exp(gauss(m,v))">random::logNormal</a>(<a class="code hl_variable" href="namespaceshark_1_1random.html#ab5c1547eee483974d008d43f621a2234">random::globalRng</a>,  0, tau0 + tau1 );</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>            </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>            <span class="comment">// Recombine search points</span></div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span>            offspring[i].searchPoint() = uniform(<a class="code hl_variable" href="namespaceshark_1_1random.html#ab5c1547eee483974d008d43f621a2234">random::globalRng</a>, mom-&gt;searchPoint(), dad-&gt;searchPoint() );</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>            <span class="comment">// Mutate search point</span></div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>            offspring[i].searchPoint() = offspring[i].chromosome() * mutationDistribution(<a class="code hl_variable" href="namespaceshark_1_1random.html#ab5c1547eee483974d008d43f621a2234">random::globalRng</a>).first;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>    </div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>            <span class="comment">// Assign fitness</span></div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>            offspring[i].unpenalizedFitness() = ackley.<a class="code hl_function" href="structshark_1_1benchmarks_1_1_ackley.html#af29a45fc5214e7df24f258050370f48d" title="Evaluates the objective function for the supplied argument.">eval</a>( offspring[i].<a class="code hl_function" href="namespaceshark.html#a68954303294e98c77d03dad52e32bd9e">searchPoint</a>() );</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>        }</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>    </div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span>        <span class="comment">// Selection </span></div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>        example::FitnessComparator comp;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>        std::sort( offspring.begin(), offspring.end(), comp );</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>        std::copy( offspring.begin(), offspring.begin() + Mu, parents.begin() );</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span> </div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>        </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>        std::cout   &lt;&lt; ackley.<a class="code hl_function" href="classshark_1_1_abstract_objective_function.html#afaa9cc39ccb4d74a0d6db0ae2d087051" title="Accesses the evaluation counter of the function.">evaluationCounter</a>() &lt;&lt; <span class="stringliteral">&quot; &quot;</span> </div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>                &lt;&lt; parents.front().unpenalizedFitness() &lt;&lt; <span class="stringliteral">&quot; &quot;</span></div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>                &lt;&lt; parents.front().chromosome()  </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>                &lt;&lt; std::endl;</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>    }   </div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>}</div>
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